There are a handful of companies that have been building local product inventory databases, many of them under the radar. They include Krillion, NearbyNow, Shopatron, Where2GetIt, Channel Intelligence and ShopLocal. Krillion was the first to start syndicating that data. But NearbyNow is now going to take its billion product database and make it available in the near future through a free API. It’s working first to integrate the inventory data with some selected partners (TheFind is the first announced). But eventually anyone will be able to tap into it.